Mercedes has assigned the car the internal code name C190, and may be planning a twin-turbo V-8 producing between 485 hp and 600 hp. That 600-hp mill would likely be reserved for a range-topping Black Series variant, which is also expected to be lighter. We’ve previously heard the SLR would get a new twin-turbo V-6 codenamed M276, which could be mated to a nine-speed dual-clutch transmission and electric motor for a combined output of around 483 hp. With the SLR’s long hood, it’s difficult to tell exactly what lies underneath, but you can expect whatever engine it receives to be mostly aft of the front axle for a front-mid-engine layout.

Just as it did the last time we saw it, this Mercedes prototype sports a more swept-back roofline compared to the SLS. We like the car’s profile with this swoopier rear end look, but as we pointed out last time, the rear could be camouflaged to hide an SLS-like three-box design. Our source tells us Mercedes is only planning a coupe version, but that a roadster is also possible by 2015 or 2016. As for the SLR coupe, you can expect it to arrive in late 2014 with a price tag around $120,000.

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